# Study: Early Humans May Have Been Active Both Day and Night

New research challenges the assumption that early humans were strictly diurnal, suggesting instead that our ancestors evolved flexible activity patterns spanning both day and night. The study examines how varied sleep-wake schedules may have provided survival advantages in ancient environments. This matters because it reshapes our understanding of human evolution and the natural roots of modern sleep habits.

**Importance:** 3/5

## Sources

### Science
- [New Scientist](https://www.newscientist.com/article/2584951-did-humans-evolve-to-be-active-throughout-the-day-and-night/?utm_campaign=RSS|NSNS&utm_content=home&utm_medium=RSS&utm_source=NSNS) — Tue, 18 Aug 2026 11:00:00 +0000

### Technology
- [Hacker News](https://www.history.com/articles/early-human-ancestors-diet-sugar-carbs) — Sat, 22 Aug 2026 02:37:30 +0000